Gemi, Bane of the Hellfallen

At the beginning of your upkeep, you may pay {u}{g}, if you do choose one:
-Put a 2/2 blue green Elemental creature token onto the battlefield.
-Put three +1/+1 counters on target creature.
{x}{u}{u}: Gain control of target creature. X equals it's Converted Mana Cost.